Chevrolet Silverado 2017–2020 — technical service bulletin
Bulletin 18NA150 · NHTSA communication 10163227 · issued Jun 24, 2019
Technical service bulletin
communication type
Engine
component
2017–2020
model years
13
vehicle entries
Official summary
This informational bulletin provides information on 6.6L Duramax Possible Oil Leak Path Information.
Vehicles covered
- 2017 Chevrolet Silverado
- 2019 Chevrolet Silverado 1500
- 2018 Chevrolet Silverado 2500
- 2019 Chevrolet Silverado 2500
- 2020 Chevrolet Silverado 2500
- 2020 Chevrolet Silverado 3500
- 2017 GMC Sierra
- 2019 GMC Sierra 1500
- 2018 GMC Sierra 2500
- 2019 GMC Sierra 2500
- 2020 GMC Sierra 2500
- 2020 GMC Sierra 3500
- 2018 GMC Sierra Denali
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.